Assets Held for Sale and Discontinued Operations - Asset retirement and reclamation liabilities Roll forward (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Assets Held for Sale and Discontinued Operations
Beginning balance	$ 4,246	$ 3,993
Changes in estimates, and other	(16)	(44)
Accretion expense	272	297
ARO liabilities sold	(1,071)
Ending balance	$ 3,431	$ 4,246

Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation, attributable to disposal group held for sale or disposed of.

No definition available.

Name:	aumn_DisposalGroupIncludingDiscontinuedOperationAssetsRetirementObligationRevisionOfEstimateAndOther
Namespace Prefix:	aumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration